28,142
28,142 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 5
- Digit sum
- 17
- Digit product
- 128
- Digital root
- 8
- Palindrome
- No
- Bit width
- 15 bits
- Reversed
- 24,182
- Recamán's sequence
- a(34,147) = 28,142
- Square (n²)
- 791,972,164
- Cube (n³)
- 22,287,680,639,288
- Divisor count
- 4
- σ(n) — sum of divisors
- 42,216
- φ(n) — Euler's totient
- 14,070
- Sum of prime factors
- 14,073
Primality
Prime factorization: 2 × 14071
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- twenty-eight thousand one hundred forty-two
- Ordinal
- 28142nd
- Binary
- 110110111101110
- Octal
- 66756
- Hexadecimal
- 0x6DEE
- Base64
- be4=
- One's complement
- 37,393 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒁹𒁹
- Egyptian hieroglyphic
- 𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵κηρμβʹ
- Mayan (base 20)
- 𝋣·𝋪·𝋧·𝋢
- Chinese
- 二萬八千一百四十二
- Chinese (financial)
- 貳萬捌仟壹佰肆拾貳
Digit at this position in famous constants
- π — Pi (π)
- Digit 28,142 = 6
- e — Euler's number (e)
- Digit 28,142 = 5
- φ — Golden ratio (φ)
- Digit 28,142 = 0
- √2 — Pythagoras's (√2)
- Digit 28,142 = 6
- ln 2 — Natural log of 2
- Digit 28,142 = 0
- γ — Euler-Mascheroni (γ)
- Digit 28,142 = 9
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 28142, here are decompositions:
- 19 + 28123 = 28142
- 31 + 28111 = 28142
- 43 + 28099 = 28142
- 61 + 28081 = 28142
- 73 + 28069 = 28142
- 181 + 27961 = 28142
- 199 + 27943 = 28142
- 223 + 27919 = 28142
Showing the first eight; more decompositions exist.
UTF-8 encoding: E6 B7 AE (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.109.238.
- Address
- 0.0.109.238
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.109.238
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 28142 first appears in π at position 135,857 of the decimal expansion (the 135,857ordinal-suffix:th digit after the integer 3).
Search range: the first 1,000,000 fractional digits of π. Any 6-digit-or-shorter string is virtually guaranteed to appear in there — the more interesting signal is the position.